有色设备

In order to improve the effect of planar magnetic abrasive finishing, the change of magnetic field is enhanced to make the abrasive roll and renew. In this paper, a magnetic particle grinding device with permanent magnet alternating field was designed. The device uses the alternating magnetic field generated by the permanent magnet alternating pole for magnetic particle grinding processing. Software was used to simulate the permanent magnet alternating magnetic field and observe the change of magnetic induction intensity in the grinding area. During the grinding experiment, SUS304 stainless steel plate was used as workpiece, grinding time is 30min, magnetic abrasive particle size is 80 mesh, the spindle speed is 150r/min, 200r/min and 250r/min. Surface morphology and roughness of the workpiece before and after grinding were compared by using ultra depth microscope and stylus roughness measuring instrument. By comparison, it can be concluded that surface morphology of SUS304 stainless steel plate is gradually improved, nearly all the texture and pits were removed. Surface roughness is reduced from the original 0.329μm to 0.069μm, and the effect of finishing is achieved. Usage of permanent magnet alternating magnetic field magnetic particle grinding device can speed up the renewal of magnetic particles, and make the grinding track more complicated, thus improving the grinding effect and grinding efficiency.